WO2016136189A1 - Sar data search apparatus, method, and recording medium - Google Patents
Sar data search apparatus, method, and recording medium Download PDFInfo
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- WO2016136189A1 WO2016136189A1 PCT/JP2016/000806 JP2016000806W WO2016136189A1 WO 2016136189 A1 WO2016136189 A1 WO 2016136189A1 JP 2016000806 W JP2016000806 W JP 2016000806W WO 2016136189 A1 WO2016136189 A1 WO 2016136189A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9021—SAR image post-processing techniques
- G01S13/9023—SAR image post-processing techniques combined with interferometric techniques
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/907—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually
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- the present invention relates to a SAR data search apparatus, method, and recording medium for searching a set of SAR data according to the purpose of creating InSAR (Interferometric SAR) data from a large amount of SAR (Synthetic Aperture Radar) data.
- InSAR Interferometric SAR
- SAR Synthetic Aperture Radar
- interference SAR performs interference processing on a pair of SAR data (a set of master data and slave data) observed from the same observation point at two different times or from two directions. It is possible to create and use three-dimensional surface layer model data (DSM: Digital Surface Model) from InSAR data generated using this technology. It is also possible to create differential interference SAR data (DInSAR: Differential InSAR) obtained by removing topographic fringes from InSAR data and use it for analysis of crustal deformation in two periods.
- DDM Digital Surface Model
- the observation date / time of the master data is close to the desired date / time.
- the interval between the observation date / time of the master data and the slave data is small.
- the second condition is a condition for minimizing an area where accurate InSAR data cannot be created.
- An object of the present invention is to provide a SAR data search apparatus, method, and recording medium that can change search conditions for a pair of SAR data according to the purpose of creating InSAR data.
- the SAR data search apparatus of the present invention includes a condition input unit that receives an input of a search condition including a search purpose and an observation date and time condition, and the search condition that is used as the search condition according to the search purpose The observation date and time conditions are switched, and the identification information of the set of SAR data satisfying the search condition is obtained from a metadata storage unit that stores the identification information of each SAR (synthetic aperture radar) data and corresponding metadata including the observation date and time. Search means for extracting, and output means for outputting the identification information of each of the SAR data of the extracted set.
- the SAR data search method of the present invention accepts input of search conditions including a search purpose and an observation date condition, switches the observation date condition used as the search condition according to the search purpose, and identifies each SAR data
- the identification information of the set of SAR data that satisfies the search condition is extracted from a metadata storage unit that stores metadata including observation date and time corresponding to the information, and the identification information of each of the SAR data of the extracted set Is output.
- the SAR data search program stored in the computer-readable recording medium of the present invention includes a condition input function for receiving an input of a search condition including a search purpose and an observation date condition in the computer,
- the identification information of the set of SAR data satisfying the search condition is switched from a metadata storage unit that switches the observation date and time conditions used as search conditions and stores metadata including the observation date and time corresponding to the identification information of each SAR data.
- a search function for extracting the SAR data and an output function for outputting the identification information of each of the SAR data of the extracted set are realized.
- the SAR data search device, method, and recording medium of the present invention can change the search conditions for SAR data pairs (sets) according to the purpose of creating InSAR data. Then, it becomes possible to search for an optimum SAR data pair (set) according to the creation purpose.
- FIG. 1 shows a configuration example of the SAR data search apparatus according to this embodiment.
- the SAR data search device 10 includes a condition input unit 11, a search unit 12, and an output unit 13.
- the condition input unit 11 is a part that receives input of search conditions.
- the search condition includes a search purpose and an observation date / time condition.
- the output unit 13 is a part that outputs identification information of each SAR data of the extracted SAR data set.
- FIG. 2 shows an example of the operation of the SAR data search device 10 of this embodiment.
- the condition input unit 11 receives a search condition (step S101).
- the search condition includes a search purpose and an observation date condition.
- the search unit 12 switches the observation date and time conditions used as search conditions according to the search purpose, and extracts a set of SAR data satisfying the search conditions from the metadata storage unit 14 (step S102).
- the output unit 13 outputs the identification information of each SAR data of the extracted SAR data set (step S103).
- a set of SAR data satisfying the observation date condition and other search conditions according to the search purpose is extracted. Therefore, it becomes possible to change the search conditions for SAR data according to the purpose of creating InSAR data. Then, it becomes possible to search for an optimum set of SAR data according to the creation purpose.
- the metadata storage unit 14 stores metadata including identification information of each SAR data, observation range, flying object position information, observation direction information, and observation date and time.
- the observation range for example, geographic information such as latitude / longitude and UTM (Universal Transverse / Mercator) coordinates is stored.
- the position information of the flying object for example, orbit information in the inertial coordinate system of the flying object on which the SAR sensor is mounted, and as the observation direction information, the attitude information represented by a triaxial attitude angle or a quaternion is stored. .
- the input of the search condition to the condition input unit 11 can be performed by an input unit provided in the SAR data search device 10 or a user side device other than the SAR data search device 10.
- a user side apparatus is used.
- the search purpose (G1) includes, for example, creation of DSM data used for altitude analysis and creation of DInSAR data used for crustal deformation analysis.
- the condition input unit 11 receives an observation date and time condition (G4) corresponding to the search purpose (G1).
- the search purpose (G1) is the creation of DSM data
- the observation date / time condition (G4) of the SAR data that the user wants to use as the master data (hereinafter, the observation date / time condition of the master data) is accepted.
- the search purpose is creation of DInSAR data
- the observation date and time of the SAR data that the user wants to use as master data and the observation date and time of the SAR data that the user wants to use as slave data hereinafter referred to as the observation date and time conditions of the slave data).
- the condition input unit 11 that has accepted the search purpose requests the user side device for a search condition according to the search purpose, and the user side device There is a method of performing a display prompting the user to input a search condition in response to a request.
- the user side device may directly display the display prompting the user to input a search condition corresponding to the search purpose.
- FIG. 3A shows an example of display when the search purpose is creation of DSM data
- FIG. 3B shows an example of display when the search purpose is creation of DInSAR data.
- the observation position condition (G2) is information relating to a geographical area in which a SAR data set is to be searched.
- the vertical base line length (Bperp) of master data and slave data is used.
- the vertical baseline length Bperp is a straight line from Sm. This is the length of the vertical line down to SsG.
- the value of Bperp can be calculated by Equation 1 where B is the distance between the satellites of Sm and Ss, and ⁇ is the angle between the straight line SsSm and the straight line SsG.
- the condition input unit 11 accepts the threshold value (maximum value) of the vertical baseline length as the distance condition (G3).
- the search unit 12 extracts a set of SAR data satisfying the search condition from the metadata storage unit 14 (step S102).
- a pair of master data and slave data is extracted.
- the search unit 12 searches the metadata storage unit 14 based on the observation position condition (G2).
- the SAR metadata of the data at the geographical position satisfying the observation position condition (G2) is acquired. Since the metadata is associated with the original SAR data as identification information, the data acquired by the search unit 12 is identification information. At this time, if there are a plurality of metadata satisfying the observation position, a plurality of pieces of identification information are acquired. These pieces of acquired identification information are set as candidate data T1.
- the candidate data T1 is further narrowed down based on the distance condition (G3) between the two flying objects.
- the metadata storage unit 14 is searched using the identification information included in the candidate data T1 as a search keyword, and the observation range, the position information of the flying object, the observation direction information, and the observation date and time corresponding to the identification information are acquired. Accordingly, the set data of the observation range, the position information of the flying object, the observation direction information, and the observation date / time is acquired by the number of identification information included in the candidate data. If a plurality of pieces of identification information exist in the candidate data T1, SAR data pairs can be formed by twice the number of these combinations (twice because the combination in which the master and the slave are exchanged is also considered).
- the vertical baseline length is calculated based on the observation range corresponding to the identification information of each SAR data, the position information of the flying object, the observation direction information, and the observation date and time.
- the master data observation satellite position Sm and the slave data observation satellite position Ss are calculated from the observation date and time, the position information of the flying object, and the observation direction information, and the observation point G is the observation range (for example, the center position of the observation range) or It is obtained from position information and observation direction information. Then, it is determined whether or not the calculated vertical baseline length is equal to or less than the threshold value of the distance condition (G3).
- the new candidate data T2 includes a plurality of pairs of identification information, the observation date and time of the SAR data corresponding to each identification information, and the vertical baseline length in each pair. If there is no pair included in the candidate data T2, the search unit 12 outputs to the output unit 13 that there is no candidate data.
- the candidate data T2 is further narrowed down based on the observation date condition (G4).
- the observation date and time of each SAR data included in the candidate data T2 if there is SAR data that is separated from the observation date and time condition (G4) by a predetermined period or longer, the pair including the SAR data is deleted from the candidate data T2, The remaining pair is set as new candidate data T3.
- a pair of SAR data that satisfies the following conditions is left as candidate data T3.
- ⁇ Master data observation date / time is within the specified range from the observation date / time condition
- ⁇ Master data and slave data observation date / time is within the predetermined range
- SAR data satisfying the following conditions: Are left as candidate data T3.
- the observation date / time of the master data is within a predetermined range from the observation date / time condition.
- the observation date / time of the slave data is within a predetermined range from the observation date / time condition. If there is no pair included in the candidate data T3, the search unit 12 has no candidate data. Is output to the output unit 13.
- the pair identification information included in the candidate data T3 is output to the output unit 13 (step S103).
- the candidate data T3 may be rearranged in a predetermined order such as the order of observation date / time close to the observation date / time condition or the order of short vertical baseline length.
- the vertical base line length and the observation date and time may be output together with the identification information, and rearranged and displayed by the user side device.
- a set of SAR data satisfying an observation date condition and other search conditions according to the search purpose is extracted. Therefore, it becomes possible to change the search conditions for SAR data according to the purpose of creating InSAR data. Then, it becomes possible to search for an optimum set of SAR data according to the creation purpose.
- the SAR data search device 20 By operating the SAR data search device 20 in this way, it becomes possible to change the search conditions for SAR data according to the purpose of creating InSAR data. Furthermore, the search result can be presented to the user together with the index.
- the operation is the same as that described in the second embodiment until the candidate data T1 is narrowed down based on the distance condition (G3) and new candidate data T2 is extracted.
- the index calculation unit 25 calculates an index for each pair (step S203).
- the index S is calculated by Equation 2.
- D1 is an interval between the observation date and time conditions of the master data and the observation date and time of the master data
- D2 is an interval between the observation date and time of the master data and the observation date and time of the slave data.
- the observation date / time condition of the master data is the observation date / time condition (G4) input to the condition input unit 11.
- ⁇ 1, ⁇ 1, and ⁇ 1 are real numbers, and are determined in advance based on a search policy such as whether the vertical base line length is important or the observation date interval is important. The smaller this index S is, the more suitable the SAR data pair is for DSM data creation.
- an index is calculated for each pair, and the identification information of each pair and the calculated index are output to the output unit 13 as a search result.
- this rearrangement may be performed by a user side device.
- the output unit 13 outputs the search result received from the index calculation unit 25 to the user side device (step S204).
- the user side device that has received the search result performs display such as displaying SAR data pairs in ascending order of the index.
- display such as displaying SAR data pairs in ascending order of the index.
- the SAR data search device 20 By operating the SAR data search device 20 as described above, it is possible to search for SAR data that satisfies the observation date condition according to the observation position condition, the distance condition, and the search purpose. Furthermore, it becomes possible to preferentially display a pair of SAR data with an observation date and time close to the observation date and time conditions on the user side device, with the vertical base line length between the SAR data pairs being short.
- InSAR data pairs with a short vertical baseline length between SAR data pairs and close observation dates of master data and slave data are preferentially output as search results. Is done.
- the master data and slave data that have a short vertical baseline length between SAR data pairs and that are close to the observation date and time of the two periods that the user wants to analyze are retrieved. Is preferentially output. As a result, the quality of InSAR data created from the SAR data pair can be improved, thereby improving the quality of DSM data or DInSAR data.
- a set of SAR data satisfying an observation date condition and other search conditions according to the search purpose is extracted. To do. Therefore, it becomes possible to change the search conditions for SAR data according to the purpose of creating InSAR data. Then, it becomes possible to search for an optimum set of SAR data according to the creation purpose. Furthermore, by calculating an index for each searched set of SAR data, it is possible to preferentially show the user a set more suitable as a search result. Thereby, it is possible to improve the quality of the created InSAR data.
- DInSAR data from which the amount of crustal deformation can be read can be obtained by removing the terrain-influenced portion of InSAR data from InSAR data using 3D terrain model data.
- 3D terrain model data existing DEM (Digital Elevation Model) data such as the Geographical Survey Institute digital elevation model 10 m mesh can be used. It is also possible to create and use DSM data from another SAR data pair.
- a search for a SAR data pair for creating DSM data for creating DInSAR data is performed. It is a form in which a configuration to enable is added. This configuration may be added to either the second or third embodiment.
- the configuration example and the operation example of the SAR data search device 20 in the present embodiment are the same as those in FIGS.
- the condition input unit 11 accepts creation of DSM data or creation of DInSAR data as a search purpose. If the purpose of the search is to create DInSAR data, whether or not to create DSM data for DInSAR data creation is further accepted.
- the search purpose (G1) is to create DInSAR data and also to create DSM data
- the observation date condition of master data and the observation date condition of slave data are accepted as the observation date condition (G4).
- FIG. 8 is an example of display on the user side device when the search purpose is creation of DInSAR data and further DSM data. Other search conditions are the same as those described in the third embodiment.
- the search unit 12 When the search unit 12 creates DSM data for creating DInSAR data, it extracts slave data for creating DInSAR data and slave data 2 for creating DSM data for one master data.
- DSM data creation DSM data is created will be described.
- the search unit 12 searches the metadata storage unit 14 based on the observation position condition (G2) and extracts candidate data T1 as in the third embodiment.
- the output unit 23 indicates that there is no candidate data. Output the result. If there are three or more pieces of identification information included in the candidate data T1, the candidate data T1 is further narrowed down based on the distance condition (G3).
- the search unit 12 narrows down the candidate data T1 based on the distance condition (G3) by the same method as in the third embodiment, and sets it as new candidate data T2.
- new candidate data includes master data, slave data, slave data 2 for creating DSM data, and a total of three SAR data as one data set.
- the number of pieces of identification information included in the candidate data extracted based on the observation position condition (G2) is N
- the number of pairs of SAR data can be expressed by Equation 4.
- the total number of data sets when three SAR data are used as one data set can be expressed by Equation 5. (Since the combination of master, slave, and slave 2 is considered, the number of combinations is 6 times).
- the vertical baseline length is calculated based on the vertical baseline length (Bperp) between master data and slave data and the vertical baseline length (Bperp2) between master data and slave data 2 for one data set. calculate. Then, it is determined whether or not any of the calculated vertical baseline lengths is equal to or less than the threshold value of the distance condition (G3).
- the index S is calculated by Expression 6.
- D3 is the observation date / time condition of the master data and the observation date / time of the master data
- D4 is the observation date / time condition of the slave data and the observation date / time of the slave data
- D5 is the interval between the observation date / time of the master data and the observation date / time of the slave data 2 It is.
- These relationships are shown in FIG. ⁇ 3, ⁇ 3, ⁇ 3, ⁇ 3, and ⁇ 3 are arbitrary real numbers, and are determined in advance based on a search policy such as whether the vertical base line length is important or the observation date interval is important.
- the SAR data search device 20 By operating the SAR data search device 20 as described above, it is possible to search for SAR data that satisfies the observation date condition according to the observation position condition, the distance condition, and the search purpose. Furthermore, it is possible to preferentially display a set of SAR data with observation date and time close to the observation date and time conditions on the user side device with a short vertical base line length between SAR data sets.
- a set of SAR data satisfying the observation date condition and other search conditions according to the search purpose is extracted. To do. Therefore, it becomes possible to change the search conditions for SAR data according to the purpose of creating InSAR data. Then, it becomes possible to search for an optimum set of SAR data according to the creation purpose. Furthermore, by calculating an index for each searched set of SAR data, it is possible to preferentially show the user a set more suitable as a search result. Thereby, it is possible to improve the quality of the created InSAR data.
- the input / output interface 52 is a man-machine interface such as a keyboard that is an example of an input device and a display as an output device.
- the calculation device 53 is a calculation processing device such as a general-purpose CPU (Central Processing Unit) or a microprocessor.
- the arithmetic device 53 can read out various programs stored in the nonvolatile storage device 55 to the storage device 54 and execute processing according to the read programs.
- the non-volatile storage device 55 is a non-volatile storage device such as a ROM (Read Only Memory) and a flash memory, and can record various programs and data.
- the drive device 56 is, for example, a device that processes reading and writing of data with respect to a recording medium 57 described later.
- a SAR data search device is configured by the information processing apparatus 50 illustrated in FIG. 11, and a program capable of realizing the functions described in the above embodiments for the SAR data search device. You may implement
- the embodiment can be realized by the arithmetic device 53 executing the program supplied to the SAR data search device.
- some of the functions of the SAR data search apparatus may be configured by the information processing apparatus 50 instead of the entire SAR data search apparatus.
- the program may be recorded in the recording medium 57, and the program may be appropriately stored in the nonvolatile storage device 55 at the shipping stage or the operation stage of the SAR data search apparatus.
- the program supply method a method of installing the program in the SAR data search apparatus using an appropriate jig in a manufacturing stage before shipment or an operation stage may be adopted.
- the program supply method may employ a general procedure such as a method of downloading from the outside via a communication line such as the Internet.
- Condition input means for accepting input of search conditions including search purpose and observation date and time conditions;
- the search date condition used as the search condition is switched according to the search purpose, and the search is performed from a metadata storage unit that stores metadata including identification information of each SAR (synthetic aperture radar) data and corresponding observation date and time.
- Search means for extracting the identification information of the set of SAR data satisfying a condition;
- An SAR data search apparatus comprising: output means for outputting the identification information of each SAR data of the extracted set.
- Appendix 2 The SAR data search device according to appendix 1, wherein the search purpose includes creation of DSM (Digital Surface Model) data and / or creation of DInSAR (Differential Interferometric SAR) data.
- DSM Digital Surface Model
- DInSAR Direct Interferometric SAR
- the search means extracts master data and slave data as the set,
- the SAR data search device according to appendix 2, wherein the observation date / time condition is a condition related to the observation date / time of the master data.
- the search means extracts master data, first slave data, and second slave data as the set,
- the SAR data search device wherein the observation date / time condition is a condition related to the observation date / time of the master data, the first slave data, and the second slave data.
- Index calculating means for calculating an index for each of the sets extracted by the search means;
- the SAR data search device according to any one of appendix 1 to appendix 5, wherein the output means outputs the index together with the identification information.
- the index includes an interval between the observation date and time condition and the observation date and time of the SAR data of the set, a distance between flying objects that have observed the SAR data of the set, and The SAR data search device according to appendix 6, wherein the SAR data is calculated using at least one of the observation date intervals of each SAR data.
- Appendix 8 The SAR data search device according to any one of appendix 1 to appendix 7, wherein the search condition includes a condition of a distance between the flying bodies that have observed the SAR data.
- the search condition includes a condition of a distance between the flying bodies that have observed the SAR data.
- Appendix 28 The computer-readable recording medium on which the SAR data search program according to appendix 27 is recorded, wherein the distance is a vertical baseline length between the flying objects.
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Abstract
Description
・マスターデータの観測日時が希望する日時に近い
・マスターデータとスレーブデータの観測日時の間隔が小さい
上記二番目の条件は、正確なInSARデータを作成できない領域を小さく抑えるための条件である。SARデータのペア間の観測日時の間隔が大きくなると、地表状況の変化が大きくなる。地表状況の変化が大きくなると、SARデータのペア同士が干渉できずに正確なInSARデータを作成できない領域が大きくなる。そのため、マスターデータとスレーブデータの観測日時の間隔が小さいことが望ましい。 For example, when creating InSAR data for the purpose of creating DSM data, it is desirable to use a pair of SAR data that satisfies the following conditions.
The observation date / time of the master data is close to the desired date / time. The interval between the observation date / time of the master data and the slave data is small. The second condition is a condition for minimizing an area where accurate InSAR data cannot be created. As the observation date and time interval between the SAR data pairs increases, the change in the surface condition increases. When the change in the surface condition becomes large, the area where the pair of SAR data cannot interfere with each other and accurate InSAR data cannot be created increases. For this reason, it is desirable that the observation date interval of master data and slave data is small.
・マスターデータの観測日時が希望するマスターデータの日時に近い
・スレーブデータの観測日時が希望するスレーブデータの日時に近い
特許文献1には、SARデータのペアから標高情報を抽出する目的で、複数の衛星から任意に選択した二つの衛星間を結ぶベースライン長を元に、SARデータのペアを選択する方式が記載されている。 On the other hand, when creating InSAR data for the purpose of analyzing crustal deformation during two periods, it is desirable to use a pair of SAR data that satisfies the following conditions.
・ Observation date and time of master data is close to the date and time of desired master data ・ Observation date and time of slave data is close to the date and time of desired slave data In Patent Document 1, a plurality of elevation data are extracted for the purpose of extracting elevation information from a pair of SAR data. Describes a method of selecting a pair of SAR data based on a baseline length connecting two satellites arbitrarily selected from the above satellites.
まず、本発明の第一の実施形態について説明する。 [First embodiment]
First, a first embodiment of the present invention will be described.
次に、本発明の第二の実施形態について説明する。 [Second Embodiment]
Next, a second embodiment of the present invention will be described.
For the distance condition (G3) between the two flying objects, for example, the vertical base line length (Bperp) of master data and slave data is used. In FIG. 10, when the satellite position of the master data SAR observation satellite is Sm, the satellite position of the slave data SAR observation satellite is Ss, and the observation point on the surface of the slave data SAR observation satellite is G, the vertical baseline length Bperp is a straight line from Sm. This is the length of the vertical line down to SsG. The value of Bperp can be calculated by Equation 1 where B is the distance between the satellites of Sm and Ss, and θ is the angle between the straight line SsSm and the straight line SsG. Here, the
・マスターデータの観測日時が観測日時条件から所定の範囲内
・マスターデータとスレーブデータの観測日時の間隔が所定の範囲内
一方、DInSARデータの作成が目的の場合は、以下の条件を満たすSARデータのペアを候補データT3として残す。
・マスターデータの観測日時が観測日時条件から所定の範囲内
・スレーブデータの観測日時が観測日時条件から所定の範囲内
候補データT3に含まれるペアがない場合、検索部12は候補データがない旨を出力部13へ出力する。そして、候補データT3に含まれるペアが1つ以上ある場合、候補データT3に含まれるペアの識別情報を出力部13へ出力する(ステップS103)。このとき、候補データT3に含まれるペアが複数の場合には、観測日時条件に近い観測日時の順や垂直基線長の短い順等の所定の順に並べ替えて出力しても良い。あるいは、識別情報とともに垂直基線長や観測日時を出力し、利用者側装置で並べ替えて表示するようにしても良い。 For example, if the purpose is to create DSM data, a pair of SAR data that satisfies the following conditions is left as candidate data T3.
・ Master data observation date / time is within the specified range from the observation date / time condition ・ Master data and slave data observation date / time is within the predetermined range On the other hand, if the purpose is to create DInSAR data, SAR data satisfying the following conditions: Are left as candidate data T3.
The observation date / time of the master data is within a predetermined range from the observation date / time condition./The observation date / time of the slave data is within a predetermined range from the observation date / time condition. If there is no pair included in the candidate data T3, the
次に、本発明の第三の実施形態について説明する。 [Third embodiment]
Next, a third embodiment of the present invention will be described.
When the search purpose is creation of DSM data, for example, the index S is calculated by Equation 2. D1 is an interval between the observation date and time conditions of the master data and the observation date and time of the master data, and D2 is an interval between the observation date and time of the master data and the observation date and time of the slave data. These relationships are shown in FIG. The observation date / time condition of the master data is the observation date / time condition (G4) input to the
When the search purpose is creation of DInSAR data, for example, the index S is calculated by Equation 3. D3 is the observation date / time condition of the master data and the observation date / time of the master data, and D4 is the interval of the observation date / time condition of the slave data and the observation date / time of the slave data. These relationships are shown in FIG. The observation date / time condition for the master data and the observation date / time condition for the slave data are the observation date / time conditions (G4) input to the
次に、本発明の第四の実施の形態について説明する。 [Fourth embodiment]
Next, a fourth embodiment of the present invention will be described.
However, unlike the third embodiment, new candidate data includes master data, slave data, slave data 2 for creating DSM data, and a total of three SAR data as one data set. When the number of pieces of identification information included in the candidate data extracted based on the observation position condition (G2) is N, the number of pairs of SAR data can be expressed by Equation 4. On the other hand, the total number of data sets when three SAR data are used as one data set can be expressed by Equation 5. (Since the combination of master, slave, and slave 2 is considered, the number of combinations is 6 times).
In the
上述した本発明の各実施形態におけるSARデータ検索装置(10、20)を、一つの情報処理装置(コンピュータ)を用いて実現するハードウェア資源の構成例について説明する。なお、SARデータ検索装置は、物理的または機能的に少なくとも二つの情報処理装置を用いて実現してもよい。また、SARデータ検索装置は、専用の装置として実現してもよい。また、SARデータ検索装置の一部の機能のみを情報処理装置を用いて実現しても良い。 [Hardware configuration example]
A configuration example of hardware resources that implements the SAR data search device (10, 20) in each embodiment of the present invention described above using one information processing device (computer) will be described. The SAR data search apparatus may be realized using at least two information processing apparatuses physically or functionally. Further, the SAR data search device may be realized as a dedicated device. Further, only some functions of the SAR data search device may be realized using an information processing device.
検索目的および観測日時条件を含む検索条件の入力を受け付ける条件入力手段と、
前記検索目的に応じて前記検索条件として使用する前記観測日時条件を切り替え、各SAR(synthetic aperture radar)データの識別情報と対応する観測日時を含むメタデータを記憶するメタデータ記憶部から、前記検索条件を満たす前記SARデータのセットの前記識別情報を抽出する検索手段と、
抽出した前記セットの各前記SARデータの前記識別情報を出力する出力手段
を備えることを特徴とするSARデータ検索装置。 (Appendix 1)
Condition input means for accepting input of search conditions including search purpose and observation date and time conditions;
The search date condition used as the search condition is switched according to the search purpose, and the search is performed from a metadata storage unit that stores metadata including identification information of each SAR (synthetic aperture radar) data and corresponding observation date and time. Search means for extracting the identification information of the set of SAR data satisfying a condition;
An SAR data search apparatus comprising: output means for outputting the identification information of each SAR data of the extracted set.
前記検索目的は、DSM(Digital Surface Model)データの作成あるいは/かつDInSAR(Differential Interferometric SAR)データの作成を含む
ことを特徴とする付記1に記載のSARデータ検索装置。 (Appendix 2)
The SAR data search device according to appendix 1, wherein the search purpose includes creation of DSM (Digital Surface Model) data and / or creation of DInSAR (Differential Interferometric SAR) data.
前記検索目的がDSMデータの作成のとき、
前記検索手段は、マスターデータとスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータの前記観測日時に関する条件である
ことを特徴とする付記2に記載のSARデータ検索装置。 (Appendix 3)
When the search purpose is creation of DSM data,
The search means extracts master data and slave data as the set,
The SAR data search device according to appendix 2, wherein the observation date / time condition is a condition related to the observation date / time of the master data.
前記検索目的がDInSARデータの作成のとき、
前記検索手段は、マスターデータとスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータと前記スレーブデータの前記観測日時に関する条件である
ことを特徴とする付記2に記載のSARデータ検索装置。
検索装置。 (Appendix 4)
When the search purpose is to create DInSAR data,
The search means extracts master data and slave data as the set,
The SAR data search device according to appendix 2, wherein the observation date / time condition is a condition related to the observation date / time of the master data and the slave data.
Search device.
前記検索目的がDInSARデータの作成およびDSMデータの作成のとき、
前記検索手段は、マスターデータと第一のスレーブデータと第二のスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータと前記第一のスレーブデータと第二のスレーブデータの前記観測日時に関する条件である
ことを特徴とする付記2に記載のSARデータ検索装置。 (Appendix 5)
When the search purpose is creation of DInSAR data and creation of DSM data,
The search means extracts master data, first slave data, and second slave data as the set,
The SAR data search device according to appendix 2, wherein the observation date / time condition is a condition related to the observation date / time of the master data, the first slave data, and the second slave data.
前記検索手段で抽出した各前記セットについて指標を算出する指標算出手段
をさらに備え、
前記出力手段は、前記識別情報とともに前記指標を出力する
ことを特徴とする付記1から付記5のいずれかに記載のSARデータ検索装置。 (Appendix 6)
Index calculating means for calculating an index for each of the sets extracted by the search means;
The SAR data search device according to any one of appendix 1 to appendix 5, wherein the output means outputs the index together with the identification information.
前記指標は、前記検索目的に応じて、前記観測日時条件と前記セットの前記SARデータの前記観測日時との間隔、前記セットの各前記SARデータを観測した飛翔体の間の距離、前記セットの各前記SARデータの前記観測日時の間隔のうち、すくなくとも一つを用いて算出する
ことを特徴とする付記6に記載のSARデータ検索装置。 (Appendix 7)
The index includes an interval between the observation date and time condition and the observation date and time of the SAR data of the set, a distance between flying objects that have observed the SAR data of the set, and The SAR data search device according to appendix 6, wherein the SAR data is calculated using at least one of the observation date intervals of each SAR data.
前記検索条件は、前記SARデータを観測した飛翔体の間の距離の条件を含む
ことを特徴とする付記1から付記7のいずれかに記載のSARデータ検索装置。 (Appendix 8)
The SAR data search device according to any one of appendix 1 to appendix 7, wherein the search condition includes a condition of a distance between the flying bodies that have observed the SAR data.
前記距離は、前記飛翔体の間の垂直基線長である
ことを特徴とする付記8に記載のSARデータ検索装置。 (Appendix 9)
The SAR data search device according to appendix 8, wherein the distance is a vertical baseline length between the flying objects.
付記1から付記9に記載のSARデータ検索装置と、
前記メタデータを記憶するメタデータ記憶装置と、
前記SARデータ検索装置の前記条件入力手段に前記検索条件を入力し、前記出力手段から前記SARデータの前記セットの前記識別情報を受け取る利用者側装置と
を備え、
前記検索手段は前記メタデータ記憶装置から前記検索条件を満たす前記SARデータのセットの前記識別情報を抽出する
ことを特徴とするSARデータ検索システム。 (Appendix 10)
SAR data search device according to appendix 1 to appendix 9,
A metadata storage device for storing the metadata;
A user side device that inputs the search condition to the condition input means of the SAR data search device and receives the identification information of the set of the SAR data from the output means,
The SAR data search system, wherein the search means extracts the identification information of the set of SAR data satisfying the search condition from the metadata storage device.
検索目的および観測日時条件を含む検索条件の入力を受け付け、前記検索目的に応じて前記検索条件として使用する前記観測日時条件を切り替え、各SARデータの識別情報と対応する観測日時を含むメタデータを記憶するメタデータ記憶部から、前記検索条件を満たす前記SARデータのセットの前記識別情報を抽出し、抽出した前記セットの各前記SARデータの前記識別情報を出力する
ことを特徴とするSARデータ検索方法。 (Appendix 11)
The search condition including the search purpose and the observation date / time condition is received, the observation date / time condition used as the search condition is switched according to the search purpose, and the metadata including the observation date / time corresponding to the identification information of each SAR data SAR data search, wherein the identification information of the set of SAR data satisfying the search condition is extracted from a metadata storage unit to be stored, and the identification information of each of the SAR data of the extracted set is output. Method.
前記検索目的は、DSMデータの作成あるいは/かつDInSARデータの作成を含む
ことを特徴とする付記11に記載のSARデータ検索方法。 (Appendix 12)
The SAR data search method according to
前記検索目的がDSMデータの作成のとき、
前記SARデータ検索方法は、マスターデータとスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータの前記観測日時に関する条件である
ことを特徴とする付記12に記載のSARデータ検索方法。 (Appendix 13)
When the search purpose is creation of DSM data,
The SAR data search method extracts master data and slave data as the set,
The SAR data search method according to
前記検索目的がDInSARデータの作成のとき、
前記SARデータ検索方法は、マスターデータとスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータと前記スレーブデータの前記観測日時に関する条件である
ことを特徴とする付記12に記載のSARデータ検索方法。 (Appendix 14)
When the search purpose is to create DInSAR data,
The SAR data search method extracts master data and slave data as the set,
The SAR data search method according to
前記検索目的がDInSARデータの作成およびDSMデータの作成のとき、
前記SARデータ検索方法は、マスターデータと第一のスレーブデータと第二のスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータと前記第一のスレーブデータと第二のスレーブデータの前記観測日時に関する条件である
ことを特徴とする付記12に記載のSARデータ検索方法。 (Appendix 15)
When the search purpose is creation of DInSAR data and creation of DSM data,
The SAR data search method extracts master data, first slave data, and second slave data as the set,
The SAR data search method according to
抽出した各前記セットについて指標を算出し、前記識別情報とともに前記指標を出力する
ことを特徴とする付記11から付記15のいずれかに記載のSARデータ検索方法。 (Appendix 16)
The SAR data search method according to any one of
前記指標は、前記検索目的に応じて、前記観測日時条件と前記セットの前記SARデータの前記観測日時との間隔、前記セットの前記SARデータを観測した飛翔体の間の距離、前記セットの前記SARデータの前記観測日時の間隔のうち、すくなくとも一つを用いて算出する
ことを特徴とする付記16に記載のSARデータ検索方法。 (Appendix 17)
The index includes an interval between the observation date and time condition and the observation date and time of the SAR data of the set, a distance between the flying objects that observed the SAR data of the set, and the set of the set according to the search purpose. The SAR data search method according to appendix 16, wherein calculation is performed using at least one of the observation date and time intervals of SAR data.
前記検索条件は、前記SARデータを観測した飛翔体の間の距離の条件を含む
ことを特徴とする付記11から付記17のいずれかに記載のSARデータ検索方法。 (Appendix 18)
The SAR data search method according to any one of
前記距離は、前記飛翔体の間の垂直基線長である
ことを特徴とする付記18に記載のSARデータ検索方法。 (Appendix 19)
The SAR data search method according to appendix 18, wherein the distance is a vertical baseline length between the flying objects.
コンピュータに、
検索目的および観測日時条件を含む検索条件の入力を受け付ける条件入力機能と、
前記検索目的に応じて前記検索条件として使用する前記観測日時条件を切り替え、各SARデータの識別情報と対応する観測日時を含むメタデータを記憶するメタデータ記憶部から、前記検索条件を満たす前記SARデータのセットの前記識別情報を抽出する検索機能と、
抽出した前記セットの各前記SARデータの前記識別情報を出力する出力機能
を実現させることを特徴とするSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 20)
On the computer,
A condition input function that accepts input of search conditions including search purpose and observation date and time conditions,
The observation date / time condition used as the search condition is switched according to the search purpose, and the SAR satisfying the search condition is stored from a metadata storage unit that stores metadata including the observation date / time corresponding to the identification information of each SAR data. A search function for extracting said identification information of a set of data;
A computer-readable recording medium on which a SAR data search program is recorded, which realizes an output function for outputting the identification information of each SAR data of the extracted set.
前記検索目的は、DSMデータの作成あるいは/かつDInSARデータの作成を含む
ことを特徴とする付記20に記載のSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 21)
The computer-readable recording medium recording the SAR data search program according to
前記検索目的がDSMデータの作成のとき、
前記検索機能は、マスターデータとスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータの前記観測日時に関する条件である
ことを特徴とする付記21に記載のSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 22)
When the search purpose is creation of DSM data,
The search function extracts master data and slave data as the set,
The computer-readable recording medium storing the SAR data search program according to appendix 21, wherein the observation date / time condition is a condition related to the observation date / time of the master data.
前記検索目的がDInSARデータの作成のとき、
前記検索機能は、マスターデータとスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータと前記スレーブデータの前記観測日時に関する条件である
ことを特徴とする付記21に記載のSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 23)
When the search purpose is to create DInSAR data,
The search function extracts master data and slave data as the set,
The computer-readable recording medium storing the SAR data search program according to appendix 21, wherein the observation date / time condition is a condition related to the observation date / time of the master data and the slave data.
前記検索目的がDInSARデータの作成およびDSMデータの作成のとき、
前記検索機能は、マスターデータと第一のスレーブデータと第二のスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータと前記第一のスレーブデータと第二のスレーブデータの前記観測日時に関する条件である
ことを特徴とする付記21に記載のSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 24)
When the search purpose is creation of DInSAR data and creation of DSM data,
The search function extracts master data, first slave data, and second slave data as the set,
The observation date / time condition is a condition relating to the observation date / time of the master data, the first slave data, and the second slave data. Possible recording media.
前記検索機能で抽出した各前記セットについて指標を算出する指標算出機能
をコンピュータにさらに実現させ、
前記出力機能は、前記識別情報とともに前記指標を出力する
ことを特徴とする付記20から付記24のいずれかに記載のSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 25)
The computer further realizes an index calculation function for calculating an index for each set extracted by the search function,
The output function outputs the index together with the identification information. A computer-readable recording medium on which the SAR data search program according to any one of
前記指標は、前記検索目的に応じて、前記観測日時条件と前記セットの前記SARデータの前記観測日時との間隔、前記セットの前記SARデータを観測した飛翔体の間の距離、前記セットの前記SARデータの前記観測日時の間隔のうち、すくなくとも一つを用いて算出する
ことを特徴とする付記25に記載のSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 26)
The index includes an interval between the observation date and time condition and the observation date and time of the SAR data of the set, a distance between the flying objects that observed the SAR data of the set, and the set of the set according to the search purpose. The computer-readable recording medium on which the SAR data search program according to
前記検索条件は、前記SARデータを観測した飛翔体の間の距離の条件を含む
ことを特徴とする付記20から付記26のいずれかに記載のSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 27)
The search condition includes a condition of a distance between the flying bodies that have observed the SAR data. A computer-readable record in which the SAR data search program according to any one of
前記距離は、前記飛翔体の間の垂直基線長である
ことを特徴とする付記27に記載のSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 (Appendix 28)
The computer-readable recording medium on which the SAR data search program according to appendix 27 is recorded, wherein the distance is a vertical baseline length between the flying objects.
11 条件入力部
12 検索部
13、23 出力部
25 指標算出部 10, 20 SAR data search
Claims (10)
- 検索目的および観測日時条件を含む検索条件の入力を受け付ける条件入力手段と、
前記検索目的に応じて前記検索条件として使用する前記観測日時条件を切り替え、各SAR(synthetic aperture radar)データの識別情報と対応する観測日時を含むメタデータを記憶するメタデータ記憶部から、前記検索条件を満たす前記SARデータのセットの前記識別情報を抽出する検索手段と、
抽出した前記セットの各前記SARデータの前記識別情報を出力する出力手段
を備えることを特徴とするSARデータ検索装置。 Condition input means for accepting input of search conditions including search purpose and observation date and time conditions;
The search date condition used as the search condition is switched according to the search purpose, and the search is performed from a metadata storage unit that stores metadata including identification information of each SAR (synthetic aperture radar) data and corresponding observation date and time. Search means for extracting the identification information of the set of SAR data satisfying a condition;
An SAR data search apparatus comprising: output means for outputting the identification information of each SAR data of the extracted set. - 前記検索目的は、DSM(Digital Surface Model)データの作成あるいは/かつDInSAR(Differential Interferometric SAR)データの作成を含む
ことを特徴とする請求項1に記載のSARデータ検索装置。 The SAR data search apparatus according to claim 1, wherein the search purpose includes creation of DSM (Digital Surface Model) data and / or creation of DInSAR (Differential Interferometric SAR) data. - 前記検索目的がDSMデータの作成のとき、
前記検索手段は、マスターデータとスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータの前記観測日時に関する条件である
ことを特徴とする請求項2に記載のSARデータ検索装置。 When the search purpose is creation of DSM data,
The search means extracts master data and slave data as the set,
The SAR data search apparatus according to claim 2, wherein the observation date / time condition is a condition related to the observation date / time of the master data. - 前記検索目的がDInSARデータの作成のとき、
前記検索手段は、マスターデータとスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータと前記スレーブデータの前記観測日時に関する条件である
ことを特徴とする請求項2に記載のSARデータ検索装置。
検索装置。 When the search purpose is to create DInSAR data,
The search means extracts master data and slave data as the set,
The SAR data search apparatus according to claim 2, wherein the observation date / time condition is a condition related to the observation date / time of the master data and the slave data.
Search device. - 前記検索目的がDInSARデータの作成およびDSMデータの作成のとき、
前記検索手段は、マスターデータと第一のスレーブデータと第二のスレーブデータを前記セットとして抽出し、
前記観測日時条件は、前記マスターデータと前記第一のスレーブデータと第二のスレーブデータの前記観測日時に関する条件である
ことを特徴とする請求項2に記載のSARデータ検索装置。 When the search purpose is creation of DInSAR data and creation of DSM data,
The search means extracts master data, first slave data, and second slave data as the set,
The SAR data search apparatus according to claim 2, wherein the observation date / time condition is a condition related to the observation date / time of the master data, the first slave data, and the second slave data. - 前記検索手段で抽出した各前記セットについて指標を算出する指標算出手段
をさらに備え、
前記出力手段は、前記識別情報とともに前記指標を出力する
ことを特徴とする請求項1から請求項5のいずれかに記載のSARデータ検索装置。 Index calculating means for calculating an index for each of the sets extracted by the search means;
The SAR data search apparatus according to claim 1, wherein the output unit outputs the index together with the identification information. - 前記指標は、前記検索目的に応じて、前記観測日時条件と前記セットの前記SARデータの前記観測日時との間隔、前記セットの前記SARデータを観測した飛翔体の距離、前記セットの前記SARデータの前記観測日時の間隔のうち、すくなくとも一つを用いて算出する
ことを特徴とする請求項6に記載のSARデータ検索装置。 The index includes an interval between the observation date and time condition and the observation date and time of the SAR data of the set, a distance of the flying object that observed the SAR data of the set, and the SAR data of the set according to the search purpose. The SAR data search device according to claim 6, wherein at least one of the observation date and time intervals is calculated. - 前記検索条件は、前記SARデータを観測した飛翔体の間の距離の条件を含む
ことを特徴とする請求項1から請求項7のいずれかに記載のSARデータ検索装置。 The SAR data search apparatus according to any one of claims 1 to 7, wherein the search condition includes a condition of a distance between flying objects that have observed the SAR data. - 検索目的および観測日時条件を含む検索条件の入力を受け付け、前記検索目的に応じて前記検索条件として使用する前記観測日時条件を切り替え、各SARデータの識別情報と対応する観測日時を含むメタデータを記憶するメタデータ記憶部から、前記検索条件を満たす前記SARデータのセットの前記識別情報を抽出し、抽出した前記セットの各前記SARデータの前記識別情報を出力する
ことを特徴とするSARデータ検索方法。 The search condition including the search purpose and the observation date / time condition is received, the observation date / time condition used as the search condition is switched according to the search purpose, and the metadata including the observation date / time corresponding to the identification information of each SAR data SAR data search, wherein the identification information of the set of SAR data satisfying the search condition is extracted from a metadata storage unit to be stored, and the identification information of each of the SAR data of the extracted set is output. Method. - コンピュータに、
検索目的および観測日時条件を含む検索条件の入力を受け付ける条件入力機能と、
前記検索目的に応じて前記検索条件として使用する前記観測日時条件を切り替え、各SARデータの識別情報と対応する観測日時を含むメタデータを記憶するメタデータ記憶部から、前記検索条件を満たす前記SARデータのセットの前記識別情報を抽出する検索機能と、
抽出した前記セットの各前記SARデータの前記識別情報を出力する出力機能
を実現させることを特徴とするSARデータ検索プログラムを記録した、コンピュータ読み取り可能な記録媒体。 On the computer,
A condition input function that accepts search conditions including search purpose and observation date and time conditions,
The observation date / time condition used as the search condition is switched according to the search purpose, and the SAR satisfying the search condition is stored from a metadata storage unit that stores metadata including the observation date / time corresponding to the identification information of each SAR data. A search function for extracting said identification information of a set of data;
A computer-readable recording medium on which a SAR data search program is recorded, which realizes an output function for outputting the identification information of each SAR data of the extracted set.
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